These test methods cover procedures for the sampling and chemical analysis of inorganic alkaline detergents. These detergents include caustic soda, soda ash, modified soda (sequicarbonate type), sodium bicarbonate, sodium metasilicate, trisodium phosphate, tetrasodium pyrophosphate, borax, and sodium triphosphate. Different tests shall be conducted in order to determine the following properties of the detergents: total alkalinity, matter insoluble in water content, apparent density, ignition loss, pH level, turbidity, temperature rise, and particle size. Chemical analysis of the samples shall be performed by using either reverse-flow ion-exchange chromatography or paper chromatography.

1.1 These test methods cover procedures for the sampling and chemical analysis of inorganic alkaline detergents.

1.2 The procedures appear in the following order:

Sections

Caustic Soda:

 Sampling

5

 Total Alkalinity as Sodium Oxide (Na₂O)

6 – 8

 Sodium Hydroxide (NaOH)

 9 – 11

 Carbonate as Sodium Carbonate (Na₂CO₃)

12

 Carbon Dioxide (CO₂) by the Evolution Method

13 – 16

Soda Ash:

 Sampling

17

 Matter Volatile at 150 to 155°C

18 and 19

 Total Alkalinity as Sodium Carbonate (Na₂CO₃ )

20 – 22

 Sodium Bicarbonate (NaHCO₃)

23 – 25

 Sodium Bicarbonate (NaHCO₃) by Potentiometric Titration

26 – 28

 Matter Insoluble in Water

29 and 30

 Apparent Density

31 and 32

Modified Soda (Sequicarbonate Type):

 Sampling

33

 Total Alkalinity as Sodium Oxide (Na₂O)

34 – 36

 Sodium Bicarbonate (NaHCO₃) and Sodium Carbonate (Na₂CO₃)

37 – 39

 Matter Insoluble in Water

40

Sodium Bicarbonate:

 Sampling

41

 Sodium Bicarbonate, Sodium Carbonate, and Free Moisture

42 – 45

 Matter Insoluble in Water

46

Sodium Metasilicate, Sodium Sesquisilicate and Sodium Orthosil-   icate:

 Sampling

47

 Total Alkalinity as Sodium Oxide (Na₂O)

48 – 50

 Total Silica as SiO₂

51 – 53

 Sodium Metasilicate (Na₂SiO₃·5H₂O)

54

 Sodium Sesquisilicate (3Na₂O·2SiO₂·11H₂O)

55

 Matter Insoluble in Water

56 and 57

 Loss on Ignition of Sodium Sesquisilicate (3Na₂O·2SiO₂ ·11H₂O)

58 and 59

 Sodium Orthosilicate (Na₄SiO₄)

60

Trisodium Phosphate:

 Sampling

61

 Trisodium Phosphate (Na₃PO₄) Content and Phosphorus   Pentoxide (P₂O₅)

 
62 – 64

 Trisodium Phosphate Calculated as Na₃PO₄·12H₂O, Na₃PO₄·   H₂O, Na₃PO₄, and as P₂O₅

 
65 – 68

 Total Alkalinity as Sodium Oxide (Na₂O)

69 – 71

 Matter Insoluble in Water

72 and 73

Tetrasodium Pyrophosphate:

 Sampling

74

 Tetrasodium Pyrophosphate
  (Na₄P₂O₇)

 
75 – 79

 Matter Insoluble in Water

80 and 81

 Loss on Ignition

82 and 83

Borax:

 Sampling

84

 Total Borate and Excess Alkalinity or Acidity

85 – 87

 Matter Insoluble in Water

88 and 89

Sodium Triphosphate:

 Sampling

90

 Tritratable Na₂O

91 – 94

 Total P₂O₅:

  Preferred Method

95 – 97

  Alternative Method

 98 – 101

  pH Titration

102 – 107

 Quantitative Separation and Measurement of Various Phosphates:

  Reverse-Flow Ion-Exchange Chromatography (Preferred    Method)

 
108 – 119

  Paper Chromatographic Method

120 – 127

 pH of 1 percent Solution

128

 Turbidity

129

 Temperature Rise

130 – 134

 Sulfate

135 – 137

 Ignition Loss

140 and 141

 Matter Insoluble in Water

142 – 144

 Particle Size

145

 Orthophosphate

146 – 151

1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. Material Safety Data Sheets are available for reagents and materials. Review them for hazards prior to usage.